Mikto-Brush-Arm Star Polymers via Cross-Linking of Dissimilar Bottlebrushes: Synthesis and Solution Morphologies,ACS Macro Letters

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Mikto-Brush-Arm Star Polymers via Cross-Linking of Dissimilar Bottlebrushes: Synthesis and Solution Morphologies
ACS Macro Letters ( IF 5.1 ) Pub Date : 2017-08-21 00:00:00 , DOI: 10.1021/acsmacrolett.7b00529
Yoshiki Shibuya _{1,

2} , Hung V-T Nguyen ₂ , Jeremiah A Johnson ₂

Affiliation

A convergent brush-first ring-opening metathesis polymerization (ROMP) approach for the synthesis of mikto-brush-arm star polymers (MBASPs) via cross-linking of dissimilar bottlebrush polymers is reported. Living bottlebrush polymers prepared via ROMP of norbornene-terminated poly(ethylene glycol) (PEG) or polystyrene (PS) macromonomers (MMs) were mixed together in a desired ratio and exposed to a bis-norbornene cross-linker to yield MBASPs with narrow size distributions. Dynamic light scattering (DLS) and transmission electron microscopy (TEM) revealed that the solution morphologies of MBASPs depended on the feed ratio of the PEG and PS bottlebrush polymers at the cross-linking stage. This work provides a robust and modular strategy for the synthesis of a new type of miktoarm star polymer wherein the star arms are bottlebrush polymers.

中文翻译：

通过不同瓶刷交联的 Mikto-Brush-Arm 星形聚合物：合成和溶液形态

报道了一种聚合刷先开环复分解聚合 (ROMP) 方法，用于通过不同瓶刷聚合物的交联来合成 mikto-brush-arm 星形聚合物 (MBASP)。通过降冰片烯封端的聚乙二醇 (PEG) 或聚苯乙烯 (PS) 大分子单体 (MM) 的 ROMP 制备的活瓶刷聚合物以所需的比例混合在一起，并暴露于双降冰片烯交联剂以产生窄尺寸的 MBASP分布。动态光散射 (DLS) 和透射电子显微镜 (TEM) 显示，MBASP 的溶液形态取决于交联阶段 PEG 和 PS 瓶刷聚合物的进料比。这项工作为合成一种新型 miktoarm 星形聚合物提供了稳健的模块化策略，其中星形臂是瓶刷聚合物。

更新日期：2017-08-21

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